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Production process for heavy nano calcium carbonate

A technology of nano calcium carbonate and heavy calcium carbonate, applied in the direction of calcium carbonate/strontium/barium, nanotechnology, calcium/strontium/barium compounds, etc., can solve the problems of inability to large-scale application, large production investment and high power consumption, Achieve the effect of considerable product quality performance, low overall energy consumption, and overall quality improvement

Active Publication Date: 2016-07-13
NANZHAO XINTAI CALCIUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its production investment is relatively large, and the power consumption in production is high, resulting in high production costs, and it cannot be applied on a large scale at present.

Method used

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  • Production process for heavy nano calcium carbonate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Take 80kg of superfine heavy calcium carbonate, 35kg of water and 0.5kg of sodium polyacrylate into the water mill, mix and stir, and grind for 15 minutes to prepare calcium slurry, and preheat clean hot air into the airflow grinder until the temperature in the airflow grinder reaches At 360°C, inject the slurry calcium according to the volume ratio of the slurry flow rate to the air flow rate of 1:50, dry and grind at 355°C for 20 minutes to obtain a semi-finished product with nano-scale particle size; when the temperature of the semi-finished product drops to 50°C, send it into Modification machine, add 1840 octadecanoic acid of 10% by weight of the semi-finished product for modification. After the modification is completed, the finished product of heavy nano-calcium carbonate can be obtained, which can be inspected, packaged and put into storage.

Embodiment 2

[0019] Take 100kg of ultra-fine heavy calcium carbonate, 35kg of water and 0.8kg of sodium polyacrylate into the water mill, mix and stir, and grind for 20 minutes to prepare calcium slurry, and feed clean hot air into the airflow grinder to preheat until the temperature in the airflow grinder reaches At 380°C, inject the slurry calcium according to the volume ratio of the slurry flow rate to the air flow rate of 1:80, dry and grind at 370°C for 30 minutes to obtain a semi-finished product with nano-scale particle size; when the temperature of the semi-finished product drops to 80°C, send it into Modification machine, add 1840 octadecanoic acid of 20% by weight of the semi-finished product for modification. After the modification is completed, the finished product of heavy nano-calcium carbonate can be obtained, which can be inspected, packaged and put into storage.

Embodiment 3

[0021] Take 1800kg of ultra-fine heavy calcium carbonate, 300kg of water and 0.6kg of sodium polyacrylate into the water mill, mix and stir, and grind for 18 minutes to prepare calcium slurry, and pass clean hot air into the airflow grinder to preheat until the temperature in the airflow grinder reaches 370 ℃, according to the volume ratio of slurry flow and air flow 1:60, inject the calcium slurry, dry and grind at 370 ℃ for 25 minutes to obtain semi-finished products with nano-scale particle size; when the temperature of semi-finished products drops to 65 ℃, send them into the Add 15% 1840 octadecanoic acid to the semi-finished product for modification. After the modification is completed, the finished product of heavy nano-calcium carbonate can be obtained, which can be inspected, packaged and put into storage.

[0022] In the present invention, a certain amount of ultrafine heavy calcium carbonate, water and sodium polyacrylate are ground and mixed through a water mill in p...

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Abstract

The invention discloses a production process for heavy nano calcium carbonate. A certain amount of superfine heavy calcium carbonate, water and sodium polyacrylate in a ratio are ground and mixed by a levigator, therefore, the granularity of calcium carbonate can effectively reach 1000 nm or smaller, and calcium carbonate is in a runny paste state; then under the combined action of thermal airflow and a preheated airflow grinding machine, effective grinding is performed while moisture is dried, the mobility of calcium carbonate is reduced while the moisture is reduced, the granularity of calcium carbonate can effectively reach 100 nm or smaller during grinding in the process, and calcium carbonate has uniform and round granules and excellent performance; finally, a modifier in a certain proportion is added, so that various performance such as the activation grade, the dispersing performance and the like of nano calcium carbonate is greatly improved, and the comprehensive performance of nano calcium carbonate is remarkably improved. The production process is simple, convenient to operate, high in efficiency and low in overall energy consumption; the cost is effectively saved, the quality and the performance of products are considerable, and the application space of the products is greatly increased.

Description

technical field [0001] The invention belongs to the technical field of calcium carbonate production, and in particular relates to a production process of heavy nanometer calcium carbonate. Background technique [0002] Calcium carbonate is a cheap and easy-to-obtain mineral product with a wide range of uses. After ultra-fine grinding, it is widely used in the manufacture of paper, rubber, paint, coatings, plastics, polymer masterbatches, cable materials, PVC, PE and other products. middle. Nano-calcium carbonate is a new type of ultra-fine solid powder material developed in the 1980s. Its particle size is between 10nm and 100nm. Due to the ultra-micronization of nano-calcium carbonate particles, its crystal structure and surface electronic structure change. It produces quantum size effect, small size effect, surface effect and macroscopic quantum effect that ordinary calcium carbonate does not have. Mechanical properties such as flatness and toughness, so it has high added...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18B82Y40/00
CPCY02P20/129C01F11/185C01P2004/60
Inventor 刘武营王玉超刘汉卿刘真真宋鲜名刘宇
Owner NANZHAO XINTAI CALCIUM IND
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